Crane



(No Model.)l

R. BAGALEY.

CRANE. No. 369,423. Patented Sept. 6, 1887.

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@Niven drames nfrnn'r @rtree L-XLPH BAGALEY, OF PITTSBURG, PENNSYLVANIA.

CRANE.

SPECIFICATION forming part of Letters Patent No. 369,423, dated September 6, 1887.

Appliealion tiled May 72,1887. Serial No. 236,759. (No modeL To @ZZ whom it may concern.-

Be it known that I, Raineri Bacana-Y, residing at Pittsburg, in the county of Alleglieny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Cranes, ci' which improvements the following is a speci fication.

In the accompanying drawings, which make part of this specilication, Figure 1 is aview in side elevation of a hydraulic crane einbodying my invention. Fig. 2 is a top plan view et' the same. Fig. 3 is a sectional view on the line r fc, Fig. 1. Fig. 4 is a View similar to Fig. 3 of a modied construction.

The invention herein relates to certain im-` provements in hydraulic and other cranes, and has for its object suclra construction and combination of part-s as will permit of the free movement ot' the jib both vertically and horizontally independent of the mast or standard and of a free inward or outward movement ofthe load without subjecting the mast or standard to lateral thrusts or strains.

The lower end of the mast or standard 1 is arranged in the hydraulic cylinder 2 in the usual manner, and in the upper end of the mast is formed a socket, 3, for the reception of the pivot-pin of the head ft. This head is formed with prongs 5, between which is arranged the jib 6, pivotally supported midway ot' its length by the pin '7, passing through the prongs. On the upper edge of the jib is formed a rib, S, serving as a track or guide for the grooved rollers 9, having axles 10, from which depend the bridles or yokes 11. To the axles 10 are also attached the rods 12, preferably \/-shaped in cross-section and provided with teeth on one of their sides, as shown. These rack-rods are ina-de of sufrieient length to extend from the outer ends of the jib to and beyond the head of the standard, where they engage a pinion, 13. This pinion 13 is secured to a short shaft, 14, journaled in the prongs 5 of the head, and is provided with grooved or sprocket wheel .15, over which passes a rope or chain, 16, whereby the pinion maybe rotated. The rack-bars are held in engagement with the pinion by the friction-rollers 17, mounted on short shafts 'strueted as shown in Fig. 4

fork 18, sufiieient weights are attached to the p chain 19 to eounterhalanee said object, or approximately so. The mast can then be raised or lowered, as required. Should it be necessary to nieve the object in or out along the jib, this can be effected by rotating the pinion 13, the counterbalancing-weights being simultaneously and equally moved, so as to preserve the equilibrium of the jib. Any small vertical movement of the object can be effected by causing the jib to rotate on its pivot-pin 7. The pin-and-soeket connection between the mast and head et permits of a horizontal rotation of the jib.

In some instances it may be desirable, or even necessary, to use a single weight, the counterbalancing of the object to be lifted being effected hy moving the weight 20 independently in or out along the jih. In suoli cases the head of the mast or standard is coni. o., with a transverse slot, in which the jib is pivoted, and with prongs 22 on the head above the jib. Between these prongs are arranged the operating-pinions 13, secured to independent shafts 14, provided with operating-wheels 15.

The above-described construction permits 2. In a crane, the combination of a vertical ico post or standard, a jib centrally pivoted on side of its pivotal point, and means for simulto said standard so as to permit of vertical and taneouslymoving them in opposite directions, horizontal movement thereof, and suspending substantially as set forth. devices mounted on the ]'ib on each side of its In testimony whereof I have hereunto set 5 pivotal point and movable therealong, submy hand.

stantially as set forth. RALPH BAGALEY.

3. In a crane, the Combination of a vertical Witnesses: post or standard, a centrally-pivoted jib, and DARWIN S. VoLoo'rT,

suspending devices mounted on the jib on each R. I-I. WHITTLESEY. 

